baber/WOPTO huggingface dataset:
Patent CA-2046593-A1 (CA)
Title: Atomic resonance filter detector employing inert buffer gas
Inventor: KEELER R NORRIS
IPC: G02F2/02
Filed: 1990-11-01
Abstract: A method is provided in which the pulse stretching effects of radiation trapping can be minimized in atomic resonance filter detectors or QLORD filter detectors of the type described in U.S.  Patent 292,526. The QLORD detector, which consists of two spectral bandpass filters (10, 12), one of each located on either side of a transparent cell (14) containing an atomic vapor (preferably an alkali metal vapor), responds to an incoming pulse in the visible part of the spectrum of light, emitting a pulse of infrared light. If the transparent cell contains atomic (e.g. metallic) vapor only, the infrared light pulse will be stretched, because of resonant trapping within the metal vapor. However, in accordance with the present invention, an inert buffer gas is added to the metal vapor. This buffer gas allows the rapid leakage of infrared light photons from the wings of the energy spectrum, and hence a more rapid response to the incoming pulse. The present invention is particularly useful in overcoming "false alarms" such as bioluminescence signals when pulse stretching and external noise sources are superimposed, and when a rapid pulse repetition rate is useful.
Patent CA-2050157-A1 (CA)
Title: Bearing assembly for lawn mower cutting blade
Inventor: MCDONNER ORVILLE R
IPC: F16C33/66
Filed: 1991-08-28
Abstract: ABSTRACT      A bearing assembly housing having at least one pair of spaced-apart bearing races surrounding a heavy duty drive shaft of a commercial lawn mower is provided with a critically located single grease fitting for introducing a lubricant to the housing to thereby allow the lubricant to enter at the top of he upper bearing race and migrate by force of gravity to the lowermost bearing race, thereby insuring sufficient lubrication of all the bearings in the housing.
Patent CA-2051156-A1 (CA)
Title: Mixtures and compositions containing phenothiazines
Inventor: EVANS SAMUEL
IPC: C10N30/10
Filed: 1991-09-11
Abstract: A mixture containing phenothiazines which is obtainable by reacting a mixture of diphenylamines comprising 1 to 5 % by weight of~~~a) diphenylamine 8 to 18 % by weight of~~~b) 4-tert-butyldiphenylamine 21 to 31 % by weight of~~~c) one or more compounds selected i) 4-tert-octyldiphenylamine ii) 4,4'-di-tert-butyldiphenylamine iii) 2,4,4'-tris-tert-butyldiphenylamine 20 to 31 % by weight of~~~d) one or more compounds selected from i) 4-tert-butyl-4'-tert-octyldiphenylamine ii) 2,2'- or 2,4'-di-tert-octyldiphenylamine iii) 2,4-di-tert-butyl-4'-tert-octyldiphenylamine, and 15 to 29 % by weight of ~~e) the compound i) 4,4'-di-tert-octyldiphenylamine, or the compounds i) 4,4'-di-tert-octyldiphenylamine and ii) 2,4-di-tert-octyl-4'-tert-butyldiphenylamine, with 1 to 200 mol % of elemental sulfur, in the presence of 0.25 to 5 mol % of a condensation catalyst selected from the group consisting of iodine, aluminium bromide, aluminium chloride, iron(III) chloride, antimony chloride, copper iodide or sulfur iodide, in the temperature range from 80 to 250°C.   The mixture containing phenothiazines finds utility as antioxidant in organic materials which are subject to degradation induced by oxidation, heat or exposure to actinic light, especially in lubricants and hydraulic fluids.
Patent CA-2051713-A1 (CA)
Inventor: LEUGERS MARY A
IPC: G01N21/85
Filed: 1991-09-18
Abstract: ABSTRACT OF THE DISCLOSURE      A probe (15) for quantitative detection of the concentration of an analyte in a sample (12) includes a hollow elongated body (14) adapted for single ended contact with the sample.  The body (14) has at least one optical fiber (22a) extended through the body (14) for transmitting modulated light (26) through the body (14), out a window (40a) at the forward end of the body (14), and along an optical axis (25) into the sample (12) to optically excite the analyte.  A pressure transducer (34) mounted beyond the window (40a) and spaced laterally away from the optical axis (25) detects an acoustic response of the analyte to the modulated light.  This probe is particularly suitable for performing remote photoacoustic analysis of analyte concentration in a sample.     36,601-F
Patent CA-2052407-A1 (CA)
Title: Cleaning of solutions of alkylphosphates
Inventor: HOLDERNESS STEWART G
IPC: C07F9/11
Filed: 1991-09-27
Abstract: Abstract of the Disclosure Title:  Cleaning of Solutions of Alkylphosphates. A process for cleaning solutions of an alkylphosphate in a hydrophobic organic solvent.  The process involves the steps of washing the solution with aqueous sulphuric acid, and contacting the washed solution with an ion exchange material.  The ion exchange material may be a resin of the type designated as styrene divinyl benzene copolymers.     30756Ans
Patent CA-2053920-A1 (CA)
Inventor: LILJA JAN
IPC: B01L3/00
Filed: 1990-04-25
Abstract: A cuvette for taking up a fluid and mixing the fluid with a reagent for analysing the mixture consists of a body (10) of glass or polymeric material having a first cavity (12) in which the fluid can be taken up, preferably by capillary action, through an inlet (13), and at least one further cavity (21) exerting capillary force on fluid which is transported from the first cavity (12) into a reception cavity (17) by subjecting the cuvette to centrifugal force. The further cavity (21) preferably exerts capillary force through a wick (19) which does not extend as far as the bottom of the reception cavity (17), and a capillary channel (20). In those cases where m~  than one further cavity (21) is provided, each such cavity (21) communicates with a further reception cavity into which the fluid can be transported from the cavity (21) by the exertion of centrifugal force. The cuvette may also have cavities for receiving washing or diluting liquid, which are connected in series or in parallel with the cavity (12).
Patent CA-2055258-A1 (CA)
Inventor: EGBERS DAVID A
IPC: B08B15/02
Filed: 1991-11-12
Abstract: A sensing means for determining the absolute position of one or more structures such as doors, windows or the like that are moveable in sets of tracks. Apparatus comprises an electrical switching means having an elongated electrical resistance means with a predetermined resistance value per unit length located adjacent to one of the sash doors, actuator means associated with the sash doors for operating said switching means, circuit means adapted to provide a substantially constant electrical current through a portion of said resistance means between an end portion of said resistance means and the nearest switch location, said circuit means thereby providing a voltage signal having a magnitude that is proportional to the distance between said end portion of said resistance means and the switch location.
Patent CA-2056388-A1 (CA)
Title: Process for the production of polyethers derived from oxetanes
Inventor: STEWART MALCOLM J
IPC: C08G65/22
Filed: 1990-05-30
Abstract: This invention relates to the production of hydroxy-terminated prepolymers suitable for use in curing reactions with isocya-nates to produce elastomers. The process involves the continuous addition over periods of 12-50 hours of an oxetane monomer to a reaction mixture consisting of a diol initiator and a catalyst capable of catalysing the cationic quasi-living cationic polymerisa-tion of the monomer, the rate of addition being such that the catalyst is always in stoichiometric excess over the monomer. Termi-nation of polymerisation is effected by the addition of brine. Under these conditions, polymers of increased molecular weight and reduced impurity levels are produced.
Patent CA-2058814-A1 (CA)
Inventor: CARLSON DAVID G
IPC: H04M1/66
Filed: 1992-01-06
Abstract: A  telephone  call  is  made  by  a  calling party.  The telephone call is routed through a telephone network to a piece  of  terminal  equipment.   The  terminal  equipment analyzes  call  information  associated  with  the telephone call.  The call information is divided into separate call attributes,  such as  calling telephone  number  and called telephone number.  One or more number lists, stored in the terminal equipment, are then searched to see if they contain an entry that matches the call attributes.   If a match is not found, the call is rejected.  If one or more matches is found, the call is routed as specified by the number list entry having the most optimal match.  The number lists can be easily user-modified.
Patent CA-2059369-A1 (CA)
Title: Distributor for a reaction water turbine
Inventor: FANELLI MICHELE
IPC: F03B3/02
Filed: 1992-01-15
Abstract: Abstract.  This distributor comprises a cylindrical annular valve  (8),  upstream and round  the turbine runner (2), associated with motor means (10) and control means (C1, C2), to move between a first retracted position whereby said valve (8) lets open the water passage and a second extended position whereby said valve (8) completely closes said water passage so as to afford a continuous governing of the water flow directed to the turbine runner (2).
Patent CA-2061124-A1 (CA)
Title: Investment casting method and pattern material comprising thermally-collapsible expanded microspheres
Inventor: QUINN JOHN A
IPC: B29C35/08
Filed: 1992-02-12
Abstract: Title INVESTMENT CASTING METHOD AND PATTERN MATERIAL COMPRISING THERMALLY-COLLAPSIBLE EXPANDED MICROSPHERES      A method and composition for forming investment casting patterns wherein thermally-collapsible microspheres are incorporated into the pattern composition.  The patterns can be made either by conventional pattern forming techniques or by solid imaging techniques.  After investing the microsphere containing pattern in the ceramic shell, the pattern and shell are heated, causing a collapse of the microspheres and thereby preventing cracking of the shell.  The shell is then heated to burn-out the remaining pattern material and fire the shell, thereby creating a mold.
Patent CA-2061673-A1 (CA)
Title: Ultraviolet curable heat activatable transfer toners
Inventor: HELD ROBERT P
IPC: G03F3/10
Filed: 1992-02-21
Abstract: TITLE  ULTRAVIOLET CURABLE HEAT ACTIVATABLE TRANSFER TONERS            ABSTRACT    A non-electroscopic prolonged tack toner for transferring toned images to an image receptor at low temperatures with improved back transfer characteristics.
Patent CA-2063584-A1 (CA)
Title: Catalyst stripper unit and process in catalytic cracking operations
Inventor: HOLMES PHILIP
IPC: C10G11/18
Filed: 1990-07-11
Abstract: A novel catalyst stripper unit and a catalyst stripping process for catalytic hydrocarbon cracking operations are described. The stripper comprises a stripper vessel (60) containing stacked, vertically separated, perforated trays (63), each having an overflow weir (65) defining the maximum depth of a layer of catalyst particles thereon. Each weir (65) forms the top end of a respective downcomer tube (66) which delivers catalyst particles from one tray to the tray immediately beneath at a location which is diametrically opposite the weir (65) of that tray so that particles must pass across the tray before overflowing the weir and descending to the next lower tray. Steam (or another stripping medium) is passed (72) into the bottom of the stripper vessel (60) and rises via the perforations in the trays and via the layers of fluidized particles of catalyst maintained thereon by the weirs (65), thereby stripping hydrocarbon materials from the catalyst particles. The steam containing stripped hydrocarbon materials may be received above the stripper vessel in a separator (12) forming part of the catalytic cracker reactor, and stripped catalyst particles are recovered from the base of the stripper vessel.
Patent CA-2064090-A1 (CA)
Title: Purification of hydrogen peroxide
Inventor: CROFTS RHONA DOROTHY
IPC: B01D61/00
Filed: 1990-07-18
Abstract: The electronics industry demands that hydrogen peroxide for use therein be purified to very low levels of impurities, currently at the level of a few ppb for some impurities, or even lower. However, existing methods are either inherently unsafe because they bring concentrated hydrogen peroxide into contact with a concentrate of transition metal decomposition agents for peroxide and a purification resin which acts as a source of carbon, or are unable to attain the desired impurity level.      In the instant purification process, the hydrogen peroxide solution is passed through a membrane having a very small pore size which contains an ion exchange resin that is capable of removing alkali and alkaline earth metal ions from solution. The feed solution is characterised in that is contains no more than a small proportion by weight of transition metals that catalyse hydrogen peroxide decomposition compared with the total metals content. The feed solution in some embodiments results from a prior treatment of an iron or copper contaminated solution with a dispersion of stannic oxide.
Patent CA-2065952-A1 (CA)
Title: Process for separating hydrogen fluoride from its mixtures with 2-chloro-1,1,1-trifluoroethane
Inventor: BERTHE BERNARD
IPC: C07C19/12
Filed: 1992-04-14
Abstract: Separation of hydrogen fluoride (HF) from its mixtures with 1,1,1-trifluoro-2-chloroethane (F133a). By settling the mixture of HF and F133a at a temperature below 0 DEG C, there is obtained a lower organic phase which is poor in HF and an upper phase which is rich in HF. The latter can be directly recycled to the fluorination reactor or subjected to a distillation to separate the HF/F133a azeotrope at the head, which is sent back to the settler, and to recover practically pure HF at the base. By distillation of the lower phase, the HF/F133a azeotrope is separated at the head, which is sent back to the settler, and F133a is recovered at the base.
Patent CA-2066561-A1 (CA)
Title: Methods for rapid microbial detection
Inventor: REES CATHERINE E D
IPC: C12R1/445
Filed: 1991-08-08
Abstract: A method of testing for target bacteria involves adding bacteriophage to a sample to infect the bacteria in the sample; kill-ing extracellular bacteriophage without at the same time killing phage-infected bacteria; amplifying bacteriophage remaining in the sample; and causing the bacteriophage to infect reporter bacteria and thereby produce an observable signal. The reporter bac-teria are genetically engineered to have an indicator gene which on expression gives rise to a detectable signal, wherein expression of the indicator gene is initiated on bacteriophage infection of the bacteria.
Patent CA-2069083-A1 (CA)
Title: Method in cleaning flue gas in a pfbc plant including a gas turbine driven thereby
Inventor: MADSEN PEDER
IPC: B01D53/94
Filed: 1990-11-20
Abstract: The invention refers to a method in cleaning flue gas in a PFBC  plant including a gas turbine driven thereby, wherein the reduction of the NOx content in the flue gas is accomplished by thermal reduction by injecting ammonia into the flue gas flow to the gas turbine and then accomplished catalytically entailed reduction in the presence of ammonia in the flue gas flow from the gas turbine.
Patent CA-2070343-A1 (CA)
Title: Method for making high efficiency volume phase holograms
Inventor: OREN MOSHE
IPC: G02B5/32
Filed: 1992-06-03
Abstract: TITLE                      METHOD FOR MAKING HIGH EFFICIENCY VOLUME PHASE HOLOGRAMS     ABSTRACT OF THE DISCLOSURE             A method for making volume phase Holographic Optical Elements derived from binary Intensity Computer Generated Holograms, Welch utilizes a photohardened refractive index-modulatory polymer sandwiched between two transparent, substantially identical, dimensionally stable substrates. The photohardened refractive index-modulatory polymer is imaged by intimately contacting the photosensitive polymer layer with a computer generated relief image photomask-master and passing actinic radiation through the photomask-master in order to change the refractive index of the exposed areas of the photopolymer to produce a volume phase Holographic Optical Element.
Patent CA-2072394-A1 (CA)
Title: Phosphorus-containing hmg-coa reductase inhibitors
Inventor: ROBL JEFFREY A
IPC: A61K31/505
Filed: 1992-06-25
Abstract: ABSTRACT     PHOSPHORUS-CONTAINING HMG-CoA      REDUCTASE INHIBITORS     Novel phosphorus-containing compounds which inhibit the activity of HMG-CoA reductase, including a 5-pyrimidinyl-containing moiety.  Pharmaceutical compositions and methods of use for the treatment or prevention of hypercholesterolemia, athero-schlerosis, hyperlipoproteinaemia and hyperlipi-demia are provided.
Patent CA-2075053-A1 (CA)
Title: Detection of point mutations in genes encoding gtp binding proteins
Inventor: MCCORMICK FRANCIS P
IPC: C12N15/09
Filed: 1991-02-07
Abstract: The present invention provides a method for detecting whether a point mutation is present in a nucleic acid encoding a GTP  bindingprotein or protein subunit. Methods are also provided for characterizing point mutations, if present. In a preferred embodiment, the method involves amplification of a nucleic acid segment followed by sequence-specific probe hybridization. The method is preferred for nucleic acids which encode a G-protein .alpha. subunit or p21 ras protein.
Patent CA-2076200-A1 (CA)
Title: Customer-operated booth for purchasing video prints
Inventor: WEISSMAN ALAN M
IPC: H04N1/21
Filed: 1992-08-14
Abstract: ABSTRACT      Customer-operated booth  for purchasing still pictures of events stored on video/electronic tape media.   The  invention includes a video/electronic cassette tape reader/adapted for frame-by-frame  viewing  and  still  picture  processing  equipment  for rendering specially selected  (edited)  frames to still picture formats.    The  booth  equipment  includes  video  monitor  and timing/control subsystems which respond to pre-set,  attendant-dictated or automatic controller-dictated time/quantity allocations that are purchased by customer/users.
Patent CA-2078145-A1 (CA)
Title: Ticket dispensing device and method
Inventor: FORD RONALD K
IPC: G07F17/42
Filed: 1991-03-13
Abstract: The ticket dispenser (60) is usable to dispense a wide variety: of tickets (68), but is particularly beneficial in dispensing lottery tickets (66), and other tickets stored in panels in fan-folded stacks (64). The leading edge of the ticket panel (124) is thrust against a curve guide (116) which serves as a barrier. This causes the lead ticket (68) to bend along a perforation line (148) and be thrust out of the outlet (44) of the ticket dispenser (60) at an angle to the rest of the panel. The rest of the panel (66) is held firmly, and the ticket (68) easily can be torn free on the perforated line (148) along which the panel: (66) is bent. A swinging gate (92) is provided for closing the outlet opening (44) and swinging away to permit bending of the ticket panel (66), and pushing and/or guiding the ticket (68) through the outlet opening (44). The dispenser (60) is fast, simple, compact and accurate, and does not cut tickets (68) in half, and yet does not permit strips (66) of tickets to be pulled out of the machine by the user who has not paid for them. A ticket vending machine (20) is formed when one or more dispensers (60) are combined with a bill acceptor. The vending machine (20) will dispense a wide variety of tickets (68) from a single unit.
Patent CA-2079612-A1 (CA)
Inventor: ARNDT HORST
IPC: H04R25/00
Filed: 1992-10-01
Abstract: A programmer for programming hearing aids which have a controller for setting the audio response parameters of the hearing aid, and which can be fitted in a patient's ear. The programmer comprises data entry means, a display unit, a microcontroller and a communication interface. The hearing aids are coupled to the programmer either using a cable or through an infrared link using a lapel unit which has a short y-cable to the hearing aids. The fitter uses the data entry means, i.e. a keypad, to program the parameters, which are then shown on the display unit. The display unit is divided into right and left ear display fields. Each display field includes a number of bar charts for displaying the values of the parameters. The display also includes an icon to indicate the type of hearing aid fitting, i.e. binaural or monaural, and an icon to indicate the hearing aid currently being programmed, i.e. right or left. The programmer also allows two sets of parameters to be stored for each ear, and then compared monaurally or binaurally.      In the preferred embodiment, both the programmer and the lapel unit are battery powered and portable. The programmer is designed to be hand-held and operated with one hand, while the lapel unit can be hung around the patient's neck.
Patent CA-2079924-A1 (CA)
Title: Catalyst composition for hydrotreating of hydrocarbon oils and process for manufacturing the same
Inventor: USUI KAZUSHI
IPC: B01J35/00
Filed: 1992-10-06
Abstract: ABSTRACT OF THE DISCLOSURE    A catalyst composition for hydrotreating of hydrocarbon oils is disclosed.  The composition comprises a Group VIB metal in an amount of 5-30% by weight, as oxide, and a Group VIII metal in an amount of 1-10% by weight, as oxide, wherein said Group VIB metal and said Group VIII metal are distributed with a concentration gradient which becomes higher from the surface toward the center of a catalyst particle according to the formulas, 0.9 > h2/h1 ? 0, wherein h1 is the Group VIB metal concentration at the center of the catalyst particle and h2 at the outermost surface of the catalyst particle, and 0.9 > h4/h3 ? 0, wherein h3 is the Group VIII metal concentration at the center of the catalyst particle and h4 at the outermost surface of the catalyst particle.  The catalyst composition can be used for hydrodesulfurization, hydrodenitrification, hydrodemetalization, and hydrocracking of topping or vacuum distillates and residues, as well as hydrotreatments for the refining of such fractions as kerosene, gas oil, wax, and lubricating oil.  It exhibits a high activity for a prolonged period of time.  Processes for manufacturing the catalyst composition are also disclosed.
Patent CA-2081216-A1 (CA)
Inventor: BERRY WILLIAM M III
IPC: H02G11/02
Filed: 1992-12-21
Abstract: A cable payoff apparatus for the controlled payout of a continuous cable from a reel is disclosed.      The apparatus comprises a pair of laterally movable housings which support a reel on a pair of pintles. A power mechanism is provided for laterally moving the housings toward and away from one another. The housings are also supported for vertical movement along a pair of upstanding masts and a power mechanism is provided for simultaneously moving the housings up and down. The pintles are independently supported for both vertical and horizontal movement relative to the housings and are thereby independently adjustable by power mechanisms into alignment with openings on the axis of the reel of cable.
Patent CA-2082607-A1 (CA)
Inventor: AVITAN ISAAC
IPC: B62D6/02
Filed: 1992-11-10
Abstract: The invention features an electronic feedback circuit for varying the steering ratio of a motorized material handling vehicle in response to the vehicular speed.  The lock-to-lock turn of the steering wheel or column is electronically adjusted in order to modify the steering response (i.e., steering angle) of the steer/drive wheel with respect to an increase in speed of the vehicle.         The steering ratio can be a straight-line function of vehicular speed.